TB 9-6625-143-24
Figure 1. Threshold connection.
(7) Decrease oscilloscope calibrator output amplitude in 10 mV increments until
activity indicators for digital channels D7 D0 are all at digital low levels. If multimeter
indication is not ≥ 4.750 V dc, perform b below.
(8) Increase oscilloscope calibrator output amplitude in 10 mV increments until
activity indicators for digital channels D7 D0 are all at digital high levels. If multimeter
indication is not ≤ 5.250 V dc, perform b below.
(9) Set oscilloscope calibrator to STBY.
(10) Turn TI knob to set threshold to -5.00 V.
(11) Set, and adjust if necessary, oscilloscope calibrator for an output, as shown on
multimeter, of -5.250 V dc.
(12) Decrease oscilloscope calibrator output amplitude in 10 mV increments until
activity indicators for digital channels D7 D0 are all at digital low levels. If multimeter
indication is not ≥ -5.250 V dc, perform b below.
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